Window-screen



I 1mm Patented Nov. 19, 1889.

W. 1). GRAVES, Jr. WINDOW SCREEN.

(No Model.)

//V VENTO/i':

ATTORNEYS.

N. PETERS, Phalo-L'nhognpher. Wnihirlghm. n. c.

WITNESSES MAW dfiW/M UNITED STATES PATENT OFFICE.

\VIIIIIIAM D. GRAVES, JR., ()F IR-ESQI E ISLE, MAINE.

WINDOW-SCREEN.

SP CIFICATION forming part of Letters Patent No. 415,453, dated November 19, 1889.

Application filed June 28, 1889. Serial No. 315,879. (No model.)

To all lull/07w it may concern:

Be it known that I, \VILLIAM D. GRAVES, Jr., of Presque Isle, in the county of Aroostook and State of Maine, have invented a new and useful Improvement in \Vindow-Qcreens, of which the following is a full, clear, and exact description.

The object of my invention is to provide a window-screen which may be ext-ended lengthwise and have its sides continuous without shoulders or offsets, so that the surface of the frame adjacent to the window-sash will fit against the same and prevent ingress of flies or other insects.

A further object is to furnish an extensible window-screen with end pieces attached to the sections, and so otfsetted as to project the face of the screen close to the lower sash.

\Vith the objects in view, as stated, my invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1, is a perspective view of the windowscreen partially extended and broken away on one corner of the frame to exhibit its novel form of construction. Fig. 2 is a transverse sectional elevation of the screen-frame, showing the preferred form of locking-connection between the rails. Fig. 3 represents a vertical cross-section of a screen-frame slightly modified in form. Fig. it is a vertical crosssection of another modification in form of the lockingconnection between two sliding sections of the screen-frame. Figure 5 is a perspective view of a portion of the screenframe, exhibiting a spring in place upon one edge of the frame; and Fig. 6 is a transverse section, in elevation, of a window-frame and its sash, showing a screen in position in the window-frame.

The frame of the screen is preferablymade of wood, and is constructed in two rectangular parts or sections A and B, (shown in Fig. 1,) said sections being intended to slide upon each other when the entire frame is to be varied in width. The top and bottom rails a l) and a b of the two sections are essentially triangular in cross-section, forming, when two rails are placed together, a rectangular rail diagonally divided, the meeting faces of the rails being provided with a locking-connection adapted to prevent lateral displacement of the parts, of which connection a preferred form is shown in Figs. l, 2, and 6, other forms being shown in the other figures of the drawings. In Figs. .,2, and 6 each rail is provided with a longitudinal groove and corresponding rib. Fig. 3 illustrates a similar construction.

Fig. 4 illustrates the two opposing faces of the rails correspoiulingly grooved to receive a tongue which may be secured in one rail, and Fig. 5 illustrates one rail grooved and the other provided with a longitudinal rib, the object being that the sides shall form a straight line when extended.

In the drawings the top and bot-tom rails of each section are oppositely arranged with respect to each other and to the rails of the corresponding section. The rails a" l) of section I are permanently united by end stiles O 0 and the rails a l) of section A are permanently united at one end by a stile C and attire other end by a strip D, secured on the faces of the rails. This arrangement permits the two sections when placed end to end to be slid upon each other, as shown in Fig. 1, when a filling-strip C can be inserted be- 11 eath the strip 1) and secured in place. Lateral displacement of the sections is prevented by the locking-connection of the rails a a and b b, one with the other, while free longitudinal movement is permitted, and the rails of the two screen-sections are all in the same vertical plane.

The ordinary extensible window-screen is usually placed beneath the lower saslnwhich is raised and caused to rest upon the screen- .frame. This method of inserting the windowscreen is inconvenient in use, as it must be displaced before the window can be closed and is in the way when a shutter needs adjustment to open or close it. To avoid the disadvantages incidental to the placing of a window-screen below the elevated lower sash, I prefer to locate my improved window-screen in the sashways or grooves S, provided for the vertical travel of the upper sash G. (See Fig.

(5. 3y locating the screen-frame outside of ICO IO of the sash to have loose contact therewith,

as mentioned, the strips E are attached to the vertical edges of the stiles C 0 which are made of a width to fit loosely the grooves S, in which they travel. Said strips E are set I 5 away from the inner face of the screen-frame and parallel to it, so as to afford a clearancespace for the two opposite parting-strips f of the window-frame.

It will be seen in Fig. 1 that the offsetting 20 of the end strips E, as just stated, will permit them to be located in the grooves S and project the body of the screen-frame inwardly, so as to have contact throughout its length with the lower rail of the lower sash when the latter 2 5 is elevated, the peculiar conformation of the top and bottom pieces of the frame-sections producing together a rectangular bar and affording a continuous level surface on the sides of these pieces of the frame-sections.

0 This method of construction will locate the inner face of the screen-frame in alignment with the inner faces of the parting-strips, and so permit the lower rail 1) to have sliding contact with the screen-frame.

For win dow-frames of usual width, where a more assured means of holding the screen in place is necessary, the slightly-elliptical plate spring or springs F is secured upon the outer edge of the frame-stiles C C as illustrated in Fig. 5. The springs F, having frictional con- 40 tact with the sides of the window-frame by their ends, press against the same and will hold the screen-frame elevated when it is needed. It is of course to be understood that the screen-frame is of a less height than the distance between the upper sash and the sill of the window-frame, so as to afford room for limited elevation of the screen-frame.

From the form of construction of the rails to I) of the screen-frame it willbe seen that the material used maybe cut to great advantage, so that very little waste will occur in working the same info form.

Having thus described my invention, Iclaim as new and desire to secure by Letters Patent 5 5 An extensible window-screen composed of two sections having their top and bottom rails cut at an angle of forty-five degrees, thus producing matinginclined faces on these rails, which faces are provided with tongued-andgrooved connections, the edges of one sliding section aligning with the sides of the other section, which adapts them to havea continuous bearing on a window-sash cross-rail when extended, each section having a vertical rectangular strip'affixed to the outer face of its stile, said strips projecting from the stiles on the outer side of the joined sections to adapt them to have a loose contact with the retaining-grooves of the window-frame in which the top sash is located and project. the inner face of the window-screen in alignment with the outer surface of the lower sash, substantially as shown and described.

\VILLIAM D. GRAVES, JR.

\Vitnesses:

CHAs. P. ALLEN, BERTRAM L. FLETCHER, 

